Revert "Remove unnecessary dependency on base."
Revert "Remove unnecessary dependency on base."

This reverts commit e0eb13cfc0dcf9d7ab37c1f49f8854bacb9688b5.

Reason for revert: breaks low bandwidth audio tests

Original change's description:
> Remove unnecessary dependency on base.
> 
> Why this dep is here is lost to history. Everything works
> without it though.
> 
> Bug: webrtc:8821
> Change-Id: Ie0d763fb8a6508f7177a2f4bc9b7d909b9b02eb6
> Reviewed-on: https://webrtc-review.googlesource.com/61962
> Commit-Queue: Patrik Höglund <phoglund@webrtc.org>
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#22441}

TBR=phoglund@webrtc.org,mbonadei@webrtc.org

Change-Id: I11a40459661e0b70974e0ec0038054e9e8ccb831
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:8821
Reviewed-on: https://webrtc-review.googlesource.com/61981
Reviewed-by: Patrik Höglund <b486136ee68458b09c92c86c39f451c87d6ef6a1@google.com>
Commit-Queue: Patrik Höglund <b486136ee68458b09c92c86c39f451c87d6ef6a1@google.com>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#22444}
ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc